Everything I Know I Learned From Television, Chapter 27: If your significant other starts spending more time in front of the computer than in bed, particularly after midnight, you’ve got a problem.

Depending which movie you’re living, it’s either compulsive gambling or an online sexual obsession. Also, if your husband looks incredibly meek, mild and asexual, but has the potential to look like Garret Dillahunt (“Raising Hope”), then it’s time to order a makeover.

“Tall Hot Blonde,” a mediocre TV movie that is Courtney Cox’s directorial debut, will premiere on Lifetime on June 23. Dillahunt portrays the bored, tired factory-working husband who suddenly falls for an online relationship with someone who goes by “tallhotblonde.”

Laura San Giacomo plays his equally tired wife. The plot takes a predictably tragic turn (in fact the film shows the tragedy first, then flashes backward). It’s based on a true story, just the latest cautionary tale about the dangers of technology messing with social interactions. Admirable acting in a by-the-numbers TV movie.

Joanne Ostrow has been watching TV since before "reality" required quotation marks. "Hill Street Blues" was life-changing. If Dickens, Twain or Agatha Christie were alive today, they'd be writing for television. And proud of it.